Money is not the driving reason for me to undertake consultancy contracts. I don't want a full time job, and I am fortunate enough that I do not need one.
My first criteria is that I can bring real value. That might be that I have experience in something that you need, or might be that I can approach the problem in a way that others cannot do. For example I could layout and route a board for you, but if you know exactly what you want and how to do it, you can probably find many other people who can do it for you more cheaply. But if you know what your problem is, but not how to solve it, I can help you, and that might result laying out and routing a board for you. A good example of this is if your company needs some electronics, but you have no electronics department or expertise.
My leading edge experience with Signal Integrity is also another place where I can bring value.
The second criteria is that it must be something that interests me, I will enjoy and I have the time to do justice to.
Projects that meet the criteria of benefiting us both, will get my commitment and you will be surprised at how quickly and independently I can work.
We would need to have a frank discussion about the freedom or limits that I should work under so that neither of us is disappointed later.
My aim is to always overachieve and end the project as friends.